Duffel bag



FIG. 1 is a perspective view of a duffel bag showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view showing the duffel bag in an open condition.

The broken lines in the figures are for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a duffel bag, as shown and described. 